unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }

  end;
  THello=class
  public

    FStr:string;
  public
    constructor Hello;
      

  end;  



var
  Form1: TForm1;

implementation

{$R *.dfm}

{ THello }

constructor THello.Hello;
begin
  FStr:='Hello';
  
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  He:THello;
begin
  HE:=THello.Hello;
  ShowMessage(He.FStr);
end;

end.
